患者56岁，右侧腹股沟阵发性疼痛6个月，左下肢麻木，右下肢无力4个月，查体左腹股沟以下痛觉减退，触觉存在，右下肢音叉振动觉消失，右下肢肌力4级，右膝踝反射亢进，右侧巴氏征(＋)，该病定位于

单项选择题In order to avoid buyer’s nonpayment after receipt of the goods, or seller’s non-shipment after receipt of the payment, which of the following payment term is more binding on the buyer and seller? A、T T B、LC C、D P D、Mixed Payment

单项选择题我国的国家性质是，()领导的，以工农联盟为基础的人民民主专政的社会主义国家。